Design

Ariya is the most aerodynamic crossover Nissan has built, but it lags behind EV rivals

The Nissan Ariya has wind glide over it in the testing tunnel.

Photo courtesy of Nisan Motor Company

Nissan is targeting a drag coefficient (Cd) of 0.297 for the Ariya all-electric crossover. If it can make that number, it will be the company's most aerodynamic crossover to date. What does that mean? Let's take a closer look.

What is drag?

Simply put, drag is an aerodynamic force. It's mechanical in nature, so it is the result of the interaction of a solid body and a liquid. In the case of a car, this liquid is air. (Yes, air is a liquid.) It only occurs when one part of the equation (the solid body or the liquid) is in motion. If there is no motion, there is no drag.

Drag only occurs in the opposite direction of the object's movement. Think of a car cutting through the air as it drives down a north-south road. As the car heads north, the air it passes through is pushed south. The car is in motion; there is drag.

2022 Nissan Ariya

Photo courtesy of Nisan Motor Company

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What is coefficient of drag?

The coefficient of drag, also called a drag coefficient, is a number that aerodynamics professions (aerodynamicists) use to determine the shape, inclination, and flow conditions on a vehicle's drag. The shape of an object (bullet vs. square vs prism, etc.) has a large impact on the amount of drag created by airflow surrounding a vehicle. Objects with narrower front ends tend to have a lower coefficient.

Scientists and vehicle designers want to keep air moving around the car for maximum efficiency. The inclination of the airflow to either move in a smooth, connected pattern, or to be broken up with air sitting, stalling in one particular part of the vehicle, lessening airflow and making the vehicle less aerodynamic.

A vehicle's Cd is determined by plugging various measurements into an equation. Cd is equal to drag (D) divided by the quantity of density (r) multiplied by half the velocity (V) squared multiple by the reference area (A). As an equation, it looks like this: Cd = D / (A * .5 * r * V^2).

The smaller the Cd, the more aerodynamic a vehicle is.

2022 Nissan Ariya

The Nissan Ariya employs aerodynamic wheel design, made to help it cut though the air with greater ease.

Photo courtesy of Nissan North America

What is the coefficient of drag of the Nissan Ariya?

"With the growing shift towards electric mobility, aerodynamic testing is becoming increasingly important. The aerodynamics of electric vehicles are directly linked to how efficiently the vehicle moves – less drag and better stability allows the customer to drive longer distances before having to recharge," said Sarwar Ahmed, Aerodynamics and Aeroacoustics Engineer at Nissan Technical Centre Europe.

Nissan is targeting a 0.297 coefficient of drag for the Ariya. How will it achieve that number? By utilizing precisely shaped body lines and strategically placed air ducts, among other components. There's a bonus to better aerodynamics when it comes to EVs.

"Following official homologation of the Nissan Ariya later this year, we anticipate the range to improve compared to the 310 mile figure shared in 2020 during the World Premiere. This will give drivers more efficiency and confidence to go even further on a single charge," said Marco Fioravanti, VP Product Planning, Nissan Europe.

How does the Ariya's coefficient of drag compare to other Nissans?

The newest Nissans, the Kicks, Pathfinder, and Frontier, don't have their Cd publicly available yet, but other models have their results. The targeted 0.297 Cd in the Ariya is less than that in the 2021 Armada, Murano, and Rogue. But, it's higher than the Nissan Leaf.

The fact that it's higher than the Leaf is not surprising. Shorter cars tend to be more aerodynamic because they sit lower to the ground and have a smaller profile. That also explains why Nissan's largest and boxiest SUV, the Armada, has the highest number on the list.

How does the Ariya's coefficient of drag compare to numbers from other EVs?

The Nissan Ariya's coefficient of drag is higher than that of most other electric cars, crossovers, and SUVs sold in the U.S. Here's where the others measure up:

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Electric vehicle concepts

Nissan shows off new concepts and plans for future EVs

Nissan showed off a group of funky concept vehicles at the announcement.

Nissan

Nissan is approaching the release of Ariya, its brand-new EV, but there are plans for much more in the automaker’s near future. Today, the Japanese company announced Nissan Ambition 2030, its plan to develop electrified vehicles and become a more sustainable company. Beyond new vehicles, the roadmap includes investments in battery recycling and charging infrastructure, new battery tech, and more widespread safety technologies.

Nissan Ambition 2030 The automaker plans for 50 percent electrification by 2030.Nissan

Nissan’s plans include 23 new electrified models by 2030. The target covers 15 new EVs and a target of 50 percent electrification. The automaker says it plans to launch a proprietary solid-state battery by 2028, and notes that it will develop a pilot production facility in Yokohama, Japan by 2024. Solid state technologies are not yet commercially viable but will offer faster charging times and better energy densities than lithium ion battery packs.

Nissan Surf-Out Concept Surf-Out is a concept truck with super funky styling.Nissan

While the focus was on the news of its electrification plans, Nissan’s concept vehicles stole the show. The Surf-Out concept truck features a long, low cargo surface and unique all-terrain tires. Typical of concept cars, the Surf-Out’s styling and design are over-the-top. The cabin is surrounded on three sides by glass and open to the bed in the rear. Instead of a grille, there’s a glass panel with an illuminated Nissan logo. It's unlikely Surf-Out or the other concepts shown will make it to production unchanged, but they show that the automaker is looking to explore bold designs with its electrified vehicles.

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New electric pickup truck

GMC Hummer EV deliveries to start soon

Hummer EV deliveries will start in December.

GMC

This year has turned out to be as difficult for automakers as 2020 was, if not much more so. The pandemic is still a major factor, and to make matters worse there's a global microchip shortage that heavily impacts automakers' ability to build tech-heavy vehicles. GMC has a big launch left to handle in 2021, and according to a recent call with journalists, it's proceeding as planned. On a recent call with reporters, GMC exec Duncan Aldred noted that Hummer EV pickup deliveries are on track to begin in December. He also elaborated on the truck's EPA range numbers.

2023 GMC Hummer EV The trucks will deliver up to 329 miles on a charge. GMC

The Hummer's EPA range lands at 329, not far from the 350 miles General Motors targeted for the vehicle. Those are the estimates for the limited Hummer Edition 1, which carries a six-figure price tag and gobs of bells and whistles. Aldred said that other models coming later on will offer longer range estimates when they hit the roads sometime in 2023.

A staggering 80 percent of reservations GMC has gathered so far are for the Edition 1 model. Almost half of the 125,000 people who have inquired about the Hummer EV have placed the refundable $100 deposit and the SUV's first year of production is completely sold out.

2023 GMC Hummer EV The Hummer EV's first year of production is sold out. GMC

When it hits the streets later this year, the Hummer EV will be just in time to face off against a growing crop of EV trucks and SUVs. Rivian recently began delivering the R1T electric pickup truck and will continue with the R1S SUV next year. The Ford F-150 Lightning is coming in 2022, and General Motors itself has a Cadillac EV rollout to handle in 2022. Chevy and GMC will show off electric versions of the Silverado and Sierra pickup trucks on January 5 and GMC will push the Hummer SUV EV in 2023.

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